This reverts commit 00639575b0.

Windows already complains about this in CI, but this will
let us catch these issues on Linux as well.

Windows already complains about this in CI, but this will
let us catch these issues on Linux as well.

Thanks to Stefan Kölbl

* fix prototypes for sphincs and static functions in aes.c

* fix missing prototypes in all frodo variants

* fix missing prototypes in kyber

* remove const from non-pointer arguments in Frodo

* add missing prototypes to requirements in README

* Minor changes

* Gracefully degrade if clang-tidy segfaults

* Typo on returncode

This does not implement the detached signature API, and will
change significantly for NIST's 2nd round anyway.

This is actually different from signature functests,
which only tests mlen=32. Can be fixed later as that does
not impact the testvectors.

Does this slightly uglily, but it should work.

LIB is already an environment variable on Windows